Thief What's Yours Is Mine PS3, There are a total of 82 collectibles in Thief. Finding all of them will earn you the What's Yours is Mine trophy. After finding the last collectible you will also get a reward of 30,000 gold which is very useful for the Cache Dispenser trophy (Use 40,000 gold).
One collectible is obtained automatically during the prologue and cannot be missed. The rest are scattered across the game's missions and open world.
To see how many collectibles an area contains, you can open up the journal, go to Player Progression and Statistics. There you'll see how many collectibles and loot items you have found in the current chapter and how many there are in total. Furthermore, there's a section called Collectibles in the journal, which lists each collectible by its name and breaks them down into categories. That makes it easier to find missing collectibles.
Also make sure to buy enough Rope arrows before each mission. They are often required to reach a hidden area.
You will also be shown an overview at the end of each chapter, which tells you how many items you have recovered. You can then replay the chapter immediately if you missed something. You can also replay chapters at any given time by returning to their starting point in the open world.